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Finding the Fourth Proportional to 2,071.71, 3,107.60 and 611.01

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Solution

The fourth proportional to 2,071.71, 3,107.60 and 611.01 is: 916.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.71 : 3,107.60 = 611.01 : x
  2. Step 2: Convert to fraction form
    2,071.71/3,107.60 = 611.01/x
  3. Step 3: Cross multiply
    2,071.71x = 3,107.60 × 611.01
  4. Step 4: Simplify right side
    2,071.71x = 1,898,774.68
  5. Step 5: Solve for x
    x = 1,898,774.68/2,071.71
  6. Step 6: Final answer
    x = 916.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.